High-throughput Plasmodium falciparum growth assay for malaria drug discovery

Antimicrobial Agents and Chemotherapy
Mary Lynn BanieckiJon Clardy

Abstract

New therapeutic agents for the treatment of malaria, the world's most deadly parasitic disease, are urgently needed. Malaria afflicts 300 to 500 million people and results in 1 to 2 million deaths annually, and more than 85% of all malaria-related mortality involves young children and pregnant women in sub-Saharan Africa. The emergence of multidrug-resistant parasites, especially in Plasmodium falciparum, has eroded the efficacy of almost all currently available therapeutic agents. The discovery of new drugs, including drugs with novel cellular targets, could be accelerated with a whole-organism high-throughput screen (HTS) of structurally diverse small-molecule libraries. The standard whole-organism screen is based on incorporation of [3H]hypoxanthine and has liabilities, such as limited throughput, high cost, multiple labor-intensive steps, and disposal of radioactive waste. Recently, screens have been reported that do not use radioactive incorporation, but their reporter signal is not robust enough for HTS. We report a P. falciparum growth assay that is technically simple, robust, and compatible with the automation necessary for HTS. The assay monitors DNA content by addition of the fluorescent dye 4',6-diamidino-2-phenylind...Continue Reading

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Related Concepts

DAPI hydrochloride
Medicinal Plants Testing, Preclinical
Indoles
Plasmodium falciparum
DNA, Protozoan
Malaria, Falciparum
Multi-Drug Resistance
Helminth Drug Sensitivity Tests

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